linux-cve-announce - CVE-2025-38667: iio: fix potential out-of-bound write

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Message-ID: <2025082200-CVE-2025-38667-c8e5@gregkh>
Date: Fri, 22 Aug 2025 18:03:04 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-cve-announce@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...nel.org>
Subject: CVE-2025-38667: iio: fix potential out-of-bound write

From: Greg Kroah-Hartman <gregkh@...nel.org>

Description
===========

In the Linux kernel, the following vulnerability has been resolved:

iio: fix potential out-of-bound write

The buffer is set to 20 characters. If a caller write more characters,
count is truncated to the max available space in "simple_write_to_buffer".
To protect from OoB access, check that the input size fit into buffer and
add a zero terminator after copy to the end of the copied data.

The Linux kernel CVE team has assigned CVE-2025-38667 to this issue.


Affected and fixed versions
===========================

	Issue introduced in 6.15 with commit 6d5dd486c715908b5a6ed02315a15ff044a91025 and fixed in 6.15.9 with commit 81a635b6eccd6fc889f6d07ab9583b705f739ce1
	Issue introduced in 6.15 with commit 6d5dd486c715908b5a6ed02315a15ff044a91025 and fixed in 6.16 with commit 16285a0931869baa618b1f5d304e1e9d090470a8

Please see https://www.kernel.org for a full list of currently supported
kernel versions by the kernel community.

Unaffected versions might change over time as fixes are backported to
older supported kernel versions.  The official CVE entry at
	https://cve.org/CVERecord/?id=CVE-2025-38667
will be updated if fixes are backported, please check that for the most
up to date information about this issue.


Affected files
==============

The file(s) affected by this issue are:
	drivers/iio/industrialio-core.c


Mitigation
==========

The Linux kernel CVE team recommends that you update to the latest
stable kernel version for this, and many other bugfixes.  Individual
changes are never tested alone, but rather are part of a larger kernel
release.  Cherry-picking individual commits is not recommended or
supported by the Linux kernel community at all.  If however, updating to
the latest release is impossible, the individual changes to resolve this
issue can be found at these commits:
	https://git.kernel.org/stable/c/81a635b6eccd6fc889f6d07ab9583b705f739ce1
	https://git.kernel.org/stable/c/16285a0931869baa618b1f5d304e1e9d090470a8